233 lines
9.0 KiB
C
233 lines
9.0 KiB
C
/*****************************************************************************/
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/* */
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/* cpu.c */
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/* */
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/* CPU specifications */
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/* */
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/* */
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/* */
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/* (C) 2003-2011, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <stdint.h>
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/* common */
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#include "addrsize.h"
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#include "check.h"
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#include "cpu.h"
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#include "strutil.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* CPU used */
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cpu_t CPU = CPU_UNKNOWN;
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/* Table with target names */
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const char* CPUNames[CPU_COUNT] = {
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"none",
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"6502",
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"6502X",
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"6502DTV",
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"65SC02", /* the original CMOS instruction set */
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"65C02", /* CMOS with Rockwell extensions */
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"65816",
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"sweet16",
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"huc6280",
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"m740",
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"4510",
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"45GS02",
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"W65C02", /* CMOS with WDC extensions */
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"65CE02", /* CMOS with CSG extensions */
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};
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/* Tables with CPU instruction sets
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* NOTE: make sure to only combine the instruction sets that are 100% compatible
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*/
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const unsigned CPUIsets[CPU_COUNT] = {
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CPU_ISET_NONE,
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CPU_ISET_6502,
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CPU_ISET_6502X | CPU_ISET_6502,
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CPU_ISET_6502DTV | CPU_ISET_6502,
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CPU_ISET_65SC02 | CPU_ISET_6502,
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CPU_ISET_65C02 | CPU_ISET_6502 | CPU_ISET_65SC02,
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/* 65816 has wai/stp and NO bit manipulation */
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CPU_ISET_65816 | CPU_ISET_6502 | CPU_ISET_65SC02,
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CPU_ISET_SWEET16,
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CPU_ISET_HUC6280 | CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02,
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CPU_ISET_M740 | CPU_ISET_6502,
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/* 4510 does NOT have indirect-zp (without z), so we can not use 65SC02 */
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CPU_ISET_4510 | CPU_ISET_6502 | CPU_ISET_65C02 | CPU_ISET_65CE02,
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CPU_ISET_45GS02 | CPU_ISET_6502 | CPU_ISET_65C02 | CPU_ISET_65CE02 | CPU_ISET_4510,
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CPU_ISET_W65C02 | CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02,
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CPU_ISET_65CE02 | CPU_ISET_6502 | CPU_ISET_65C02,
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};
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/* Defines for capabilities. Currently the entries are uint32_ts but the table
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** is deliberately hidden from the outside so it can be extended to 64 bit or
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** even more.
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*/
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#define CAP_NONE UINT32_C (0)
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#define CAP_6502 UINT32_C (0)
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#define CAP_6502X UINT32_C (0)
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#define CAP_6502DTV UINT32_C (0)
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#define CAP_65SC02 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY) | \
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(UINT32_C (1) << CAP_CPU_HAS_ZPIND) | \
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(UINT32_C (1) << CAP_CPU_HAS_STZ))
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#define CAP_65C02 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY) | \
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(UINT32_C (1) << CAP_CPU_HAS_ZPIND) | \
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(UINT32_C (1) << CAP_CPU_HAS_STZ))
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#define CAP_65816 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY) | \
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(UINT32_C (1) << CAP_CPU_HAS_ZPIND) | \
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(UINT32_C (1) << CAP_CPU_HAS_STZ))
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#define CAP_SWEET16 UINT32_C (0)
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#define CAP_HUC6280 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY) | \
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(UINT32_C (1) << CAP_CPU_HAS_ZPIND) | \
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(UINT32_C (1) << CAP_CPU_HAS_STZ))
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#define CAP_M740 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA))
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#define CAP_4510 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY))
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#define CAP_45GS02 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY))
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#define CAP_W65C02 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY))
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#define CAP_65CE02 \
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((UINT32_C (1) << CAP_CPU_HAS_BRA8) | \
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(UINT32_C (1) << CAP_CPU_HAS_INA) | \
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(UINT32_C (1) << CAP_CPU_HAS_PUSHXY))
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/* Table containing one capability entry per CPU */
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static const uint64_t CPUCaps[CPU_COUNT] = {
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CAP_NONE, /* CPU_NONE */
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CAP_6502, /* CPU_6502 */
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CAP_6502X, /* CPU_6502X */
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CAP_6502DTV, /* CPU_6502DTV */
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CAP_65SC02, /* CPU_65SC02 */
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CAP_65C02, /* CPU_65C02 */
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CAP_65816, /* CPU_65816 */
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CAP_SWEET16, /* CPU_SWEET16 */
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CAP_HUC6280, /* CPU_HUC6280 */
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CAP_M740, /* CPU_M740 */
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CAP_4510, /* CPU_4510 */
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CAP_45GS02, /* CPU_45GS02 */
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CAP_W65C02, /* CPU_W65C02 */
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CAP_65CE02, /* CPU_65CE02 */
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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int ValidAddrSizeForCPU (unsigned char AddrSize)
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/* Check if the given address size is valid for the current CPU */
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{
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switch (AddrSize) {
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case ADDR_SIZE_DEFAULT:
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/* Always supported */
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return 1;
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case ADDR_SIZE_ZP:
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/* Not supported by Sweet16 */
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return (CPU != CPU_SWEET16);
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case ADDR_SIZE_ABS:
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/* Always supported */
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return 1;
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case ADDR_SIZE_FAR:
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/* Supported by "none" and 65816 */
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return (CPU == CPU_NONE || CPU == CPU_65816);
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case ADDR_SIZE_LONG:
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/* "none" supports all sizes */
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return (CPU == CPU_NONE);
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default:
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FAIL ("Invalid address size");
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/* NOTREACHED */
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return 0;
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}
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}
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cpu_t FindCPU (const char* Name)
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/* Find a CPU by name and return the target id. CPU_UNKNOWN is returned if
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** the given name is no valid target.
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*/
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{
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unsigned I;
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/* Check all CPU names */
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for (I = 0; I < CPU_COUNT; ++I) {
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if (StrCaseCmp (CPUNames [I], Name) == 0) {
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return (cpu_t)I;
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}
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}
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/* Not found */
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return CPU_UNKNOWN;
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}
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int CPUHasCap (capability_t Cap)
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/* Check if the current CPU has the given capability */
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{
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PRECONDITION (CPU >= 0 && CPU < CPU_COUNT);
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return (CPUCaps[CPU] & (UINT32_C (1) << Cap)) != 0;
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}
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